Dynamical Systems, Part I

by Rishidev Chaudhuri

Lots-of-rabbits-iStock_000003121538MediumA dynamical system is a mathematical description of how some particular system evolves through time. These are often physical or biological systems, and dynamical systems are used to model everything from how the planets move around the sun and how earthquakes propagate to how neurons fire and how economies evolve over time. To build a dynamical system we need two things. We need some sort of abstract description of the properties of the system that will be changing; for example, if we want to understand the movements of the planets these would be their positions in space (relative to some coordinate system). We also need some rule for how these quantities evolve from moment to moment. Here, this would be a set of equations describing how the gravitational attraction between the planets causes them to accelerate in various directions.

As a simple example, imagine we are studying a group of immortal rabbits. Each year, 10% of them reproduce. If we started with 100 rabbits, in the second year we'd have 110, in the third year we'd have 121, and so on. We'd start having fractional amounts of rabbit very soon, but let's ignore that. Let's call x(n) the number of rabbits in year n. Then we can explicitly write out the rule as:

x(n+1)=1.1*x(n).

Again, this just says, “To go from year n to year n+1 take x(n) (the number of rabbits in year n) and multiply by 1.1, which is the same as adding 10%.” The rule tells us how to go from one state in time to the next one. If we started with 100 rabbits and kept applying this rule we'd get a sequence: {100, 110, 121, …}. This describes a trajectory of the system with time. “Trajectory” sounds like it should describe a path through space, and that's where the intuition comes from (see this article, for example). If we start with a different number of rabbits, we get a different trajectory (for example, starting with 90 rabbits gives us 99 rabbits at the end of the first year).

Say we start a system off in one state (here, state means number of rabbits), and wait a certain amount of time. Where will it be? One approach is to just replicate what the system would do. If we want to know what it'll do after 10 steps of time, we write down the description of where it is, apply the rule to it to get the new description, and do this ten times. This can take a long time, especially if we have many time steps. More importantly, it doesn't seem to tell us anything about the deeper structure of the system. For example, how would things change if we started the system off in a different state. Do all states end up in a similar place or do they differ wildly? If we see that the state is headed in one direction, will it keep going in that direction? In some cases, we can solve the system to get a formula that just tells us how many rabbits we'd have given a starting number and a length of time. This is typically impossible; simple update rules can give rise to systems that have no such formula. But this system does have one, and the formula is

EqGrow

Here x(0) is the starting value. Note that this formula doesn't need to be repeatedly applied; we can just put in the number of years and the starting value. Of course, given the simplicity of the update rule, applying the formula is not too much simpler than applying the update rule. The formula tells us that all of the trajectories of this system look qualitatively similar. The number of rabbits we have keeps growing and never stops, unless we started with no rabbits, in which case we'll always have no rabbits (within the assumptions of the model, of course, so we don't get to go out and buy some).

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A Poem

WEDDING PROPOSALS

I.

She circles the room,
the two men cross-legged
on woven flowers,

her kohl-lined eyes downcast
to the fringe
of their shining loafers

the fluted foot
of a samovar, henna
petals on her toes.

“Look, my child has no flaws,
no need to give ear to rumors,”
her father tells the intended

father-in-law
who’s in Srinagar for the viewing
months before the wedding.

Intended father-in-law
shakes her father’s hand
deal-sealed.

He gives her filigreed silver
wedged heels with pointed tips
too big for the girl she was

bunions not yet formed.

–March 1938

For my grandfathers’, experts des objects d’ art.

II.

Again I ease her palm into mine
We stroll on the beach

Frangipani petals
Rushlight of dusk

Inks of her sarong
My bruised jeans

Gods on horses
Spark the horizon

It’s a sign I know
What sign?

I want you to be my wife
Ask me again—she jolts me

And again her gritty palm is mine
Bending a knee I ask

Will every flower from Kenya
to Kashmir bloom?

–March 1998

For Tabish Din, again.

by Rafiq Kathwari, guest poet at 3 Quarks Daily

Copycats of the Subconscious

On Celebrity, New York, and the Movie in Your Mind.

by Mara Jebsen

Pixelated_marilyn_by_sarah_louise79-d2zvds6

I am looking at Jackie Onassis, young, wide-eyed and beast-like in one of the iconic photographs we’d all recognize. She has those startling beetle brows, and her little hat and big collar are so cute and polished that she seems somehow a Pomeranian, and like a girl you knew in 6th grade, who could say something cloying like “pretty please with a cherry on top” and get away with it. She’s pixilated. The artist, Alex Guofeng Cao, made her out of a jillion tiny little photographs of a famous photo of JFK. As a looker, as a person with limited eyeballs, you have a choice then—you can look close at the endless dark and light iterations of charming young Kennedy, or you can zoom out, and see Jackie’s big fresh face. I guess the implication is that JFK is always on her mind. Or that when we see Jackie we’re seeing JFK, too.

Guofeng Cao, whose Jackie I came across in a Chelsea gallery, has completed, it turns out, a whole series like this—JFK’s face made out of a million tiny laughing sexy Marilyn Monroes; the Marilyn made out of a million tiny Brigitte Bardots. And Jimmi Hendrix– his face a collection of repeating purple pills. Everyone obsessing, amost in a circle.

You have to wonder what he’s saying with this—and also, why its so insanely fun to look at. You have to wonder if we are made out of a million little images of the things we love; if our obsessions would even show on our faces if someone looked in close enough. Its a terrifying thought.

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Marriage

by Haider Shahbaz

Rain taps on their window. Tip tap, tip tap. She says to him: “Let’s go outside on the balcony”.

“Are you mad? It’s pouring.” he says.

“No, of course I’m not mad. You know I like being in the rain.”

“I think I’m getting a cold. I might head off to bed. Sorry.”

“Oh, it’s okay. Good night.”

She walks out on the balcony and shuts the door behind her.

There is a cold wind, a sad mist, and mammoth clouds pouring incessantly.

He doesn’t remember, she thinks. Her steps are slow, and her shoulders slouched. She feels weary, worn out. She thinks: the first time he hasn’t remembered in nine years. But his forgetting doesn’t even bother her too much. What makes her heart heavy is the burden of ten years of thinking that he was someone she knew he wasn’t. It isn’t his fault, she thinks. It’s nobody’s fault. It’s not that he doesn’t love her. He just can’t possibly remember every time. Can he?

Standing on her balcony, her hands gripped around the railing, she is looking out to the windows on the concrete apartments all around her. She is leaning forward. She likes the rain. She likes some of the clouds too.

Standing there, she feels that she has lost something in the passage of ten years. But she isn’t quite sure what it is. And she isn’t quite sure if she has lost it. For days now, she has gone around with bewildered eyes, asking everybody if they know how she can get it back. Some politely say no, others, perhaps, shrug off the question. Still others sympathize with her and weep with her and even walk with her for a while. But they can’t bear her bewildered eyes. The way they look so naked and depraved and hopeful. The way they are so ready to suffer. They way, often, her eyes gleam with a unique brightness and it charms you, as it seduces you, as it makes you take two steps closer. The way they are so earnest about love. Even after ten years, the way they love with a careless innocence. It’s all there, in her big bewildered eyes. She is rhythm, rhyme, long and short verses that break and lose themselves only to come back to meaning.

And she is with him, he who is prose. But prose that is obsessed with poetry, obsessed with rhythm, obsessed with rhyme, but prose that is never able to break and lose itself only to come back to meaning. He never does that.

But she doesn’t want to think of him right now.

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Monday Poem

Schrödinger's Cat

being in two states at once in a box
alive and not —am I

Schrödinger’s cat?
rutting for grub nose to the ground

still, I can hear the high art of
sparrow sound

& catch sweet honeysuckle molecules
that here and now abound

in a sea of duplicity or worse
where neurons catch disparities in verse

in the nets of skulls split within
as two hemispheres in walnut shells

in heaven at times, at times in hell
they switch

right now!
can you tell which

by Jim Culleny
10/6/12

Schrödinger’s Cat: here

From “Innocence” to Mohammed Joyce

by Omar Ali

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Postscript: Today, 9th October, (afternoon in Pakistan) the Pakistani Taliban sent a gunman (or gunmen) to shoot a 14 year old girl who had become an icon of anti-Taliban resistance in her area after speaking up for female education. Yes, Codepink darlings on your way back from a faux protest march to Waziristan, education! NOT LGBT rights. NOT even complete gender equality. Just the right to go to school and aspire to a role in public life. She is now fighting for her life in a hospital. Another schoolgirl was also shot in the attack. There are reports that the driver of the school van was asked “who is Malala?”; he reportedly tried to stave them off by saying he couldn't identify girls for an outsider (Codepink may wish to protest this attempt to use patriarchal codes of female “honor” to save her life). Details are still murky. The story may change in some ways. But whatever the details, the Taliban's spokesman has called newspapers and proudly taken responsibility. She was shot for certain things she said and kept saying. That's it. She had done nothing else. She had not gone topless or thrown paint at a congressman or organized a little study circle of Tariq Ali's Trotskyite world resistance. She had, in short, committed no other crime even in the eyes of the Taliban. Inability to publicly say what you believe out of fear of this kind of violence is the ultimate restriction on free speech. I know it's too much to expect Codepink to have a clue, but others may wish to keep this in mind while reading this article. (Yes, I am picking on Codepink. In fact, I want to pick on most of the postcolonial-upperclass-university-retard crowd… I know they are mostly irrelevant, but I still want to pick on them, so there. I am probably putting my own happy relationship with the Pakistani super-elite at risk but sometimes you have to upset your friends.)

The furor over the internet clip “innocence of Muslims” has once again brought the issue of blasphemy and free speech into the headlines. The movie (its really only a trailer, there doesn’t seem to be any movie at all) generated the usual “outrage” and inevitably, Islamists in a few countries used it as a wedge issue to advance their own agenda. In Egypt and Libya, matters were relatively quickly brought under control. In Egypt, where the issue was initially highlighted, the newly elected Muslim brotherhood government seemed to realize that this affair could allow the crazier Salafists to grab the political initiative, and therefore they tamped it down; In Libya it led to the killing of a popular US ambassador but then seemed to generate some real pushback among saner segments of the population (of course, given the precarious nature of law and order in Libya and the presence of multiple armed salafist gangs, this respite may be only temporary). But it was in Pakistan that the most violent reaction eventually developed, thanks in part to the ruling elite’s cynical attempt to get ahead of the Islamists by taking ownership of the issue and declaring a national day of outrage. As predicted, this national day of outrage gave license to various Islamist gangs to indulge in rioting and burning in some of the cities. Twenty or so people were killed and property worth billions went up in flames. There are still demonstrations going on here and there, including in supposedly “moderate” Muslim countries like Malaysia and Indonesia, but on the whole, this particular iteration of the blasphemy and outrage “cycle” seems to be reaching its natural end.

As expected, this rioting and burning also provided an opportunity for some American academics to make an ass of themselves in the national media, most sensationally on Slate. Why free speech is worth protecting and why even Muslims who feel offended by the movie should let such “insults” pass was also presented on various forum, with Slate, ironically enough, providing one of the better appeals to good sense in a piece by William Saletan. Some Muslims, including some fairly chauvinistic Muslim activists in the West also stepped up with appeals to stop the self-destructive outrage and do something more positive. While a number of these articles generated during this time are worth reading, if you are only going to read one, I recommend one that few people may have seen: Professor Ali Minai wrote a article on his blog and on brownpundits.com that is a real gem and must be read more widely. The whole thing (it’s a very short post) should be read in its entirety, but this quote gives a flavor of the argument:

We have no choice but to trust the wisdom of the crowds. The First Amendment of the U.S. Constitution is the best example of this trust. To think that it relinquishes all control over speech is a misunderstanding. Rather, it trusts that a responsible, civilized people can determine the proper norms of speech for their time and place through social, i.e., bottom-up, action rather than through rigid legal control – that society itself can regulate what expression is or is not acceptable, and impose societal sanctions to enforce this flexible, unwritten code. Protection of all expression thus creates a flexible mechanism rather than a brittle one, and is a stabilizing influence rather than a destabilizing one. Wisdom, in this case, lies not in choosing what others can(not) say, but to let them choose and live with the social consequences of their choice.

Even if we leave aside the compelling philosophical arguments in favor of free speech, there are purely pragmatic reasons why the particular “problem” of anti-Islamic blasphemy is impossible to regulate to the satisfaction of the rioters.

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Life created from eggs made from skin cells

James Gallagher at the BBC:

_63301745_saitou2hrStem cells made from skin have become “grandparents” after generations of life were created in experiments by scientists in Japan.

The cells were used to create eggs, which were fertilised to produce baby mice. These later had their own babies.

If the technique could be adapted for people, it could help infertile couples have children and even allow women to overcome the menopause.

But experts say many scientific and ethical hurdles must be overcome.

More here.

The Dark Side of Thomas Jefferson

A new portrait of the founding father challenges the long-held perception of Thomas Jefferson as a benevolent slaveholder.

Henry Wiencek in Smithsonian Magazine:

ScreenHunter_20 Oct. 07 21.46With five simple words in the Declaration of Independence—“all men are created equal”—Thomas Jefferson undid Aristotle’s ancient formula, which had governed human affairs until 1776: “From the hour of their birth, some men are marked out for subjection, others for rule.” In his original draft of the Declaration, in soaring, damning, fiery prose, Jefferson denounced the slave trade as an “execrable commerce …this assemblage of horrors,” a “cruel war against human nature itself, violating its most sacred rights of life & liberties.” As historian John Chester Miller put it, “The inclusion of Jefferson’s strictures on slavery and the slave trade would have committed the United States to the abolition of slavery.”

That was the way it was interpreted by some of those who read it at the time as well. Massachusetts freed its slaves on the strength of the Declaration of Independence, weaving Jefferson’s language into the state constitution of 1780. The meaning of “all men” sounded equally clear, and so disturbing to the authors of the constitutions of six Southern states that they emended Jefferson’s wording. “All freemen,” they wrote in their founding documents, “are equal.” The authors of those state constitutions knew what Jefferson meant, and could not accept it. The Continental Congress ultimately struck the passage because South Carolina and Georgia, crying out for more slaves, would not abide shutting down the market.

More here.

Israeli officials “honor” settler who tortured Palestinian child

Ali Abunimah in Electronic Intifada:

ScreenHunter_19 Oct. 07 21.40Frequent and rising Israeli settler attacks on Palestinians almost always go unpunished.

Indeed, often, Israeli soldiers stand by and watch as Israeli settlers go on the rampage. The situation is so bad that a boy like Yousef Ikhlayl, 17, can be killed and there is no investigation or accountability.

So when an Israeli settler went to jail on Saturday for torturing and abusing a Palestinian child, it was quite an event, as Haaretz reported:

Prominent rabbis, public officials and a Knesset member, on Saturday, held a send off for a criminal about to enter prison after being convicted of abusing a Palestinian youth.

The event was held in the West Bank Shilo settlement in honor of Zvi Struck, who was convicted of abusing a Palestinian youth in July 2007, together with another man whose identity remains unknown. The two beat the youth up, bound him, fired their guns close to him, undressed him and threw him naked at the roadside. Three months earlier the two men had beaten up the same youth and killed a day-old kid.

The Jerusalem District Court sentenced Struck to 18th months in prison, which the Supreme Court extended after an appeal to 30 months.

According to Haaretz, “The send off was led by Bnei Akiva yeshivas head Rabbi Haim Drukman and Kiryat Arba Rabbi Dov Lior, Binyamin Council head Avi Ro’eh, his deputy Motti Yogev and MK [Knesset member] Arye Eldad.”

More here.

Reclaiming Politics: Solving Problems Washington Won’t

Gecan_37.5_build

Michael Gecan in Boston Review:

One party starts with a belief that government can’t and shouldn’t deal with real issues, except perhaps to cut checks to private contractors and return tax dollars to “job creators.” It is led by a group of relatively young men and women—figures such as Paul Ryan, Eric Cantor and Mike Mulvaney, Jim Jordan, and Michelle Bachmann—who were sons and daughters of the period that William Schneider referred to as “The Suburban Century. They and many of their colleagues have only known sprawl and expansion, growth and prosperity, new housing developments, malls, schools, corporate parks.

The other party was shaped by the political culture of big declining cities, where politicians remained in office while the places they represented gradually eroded. Chicago has been losing population for more than half a century, with a million fewer residents today than at its peaks and the empty neighborhoods they left behind. Violent crime in much of the south and west side is out of control, making the Windy City the nation’s most dangerous place for young males of color. In this culture of scarcity and violence, the political class has prospered. Superb public relations and campaigning have insulated its leaders from accountability. Their security has increased, with families from the Daleys on down handing offices off to second and third generations, while the safety and wellbeing of the majority of the city’s residents unravels. Civic progress and political success are severed. And White House leaders have taken these municipal experiences to Washington.

Neither party offers a way forward for the majority of Americans. In fact, there are really three parties, with the third party being the largest of all: the party of people who want America to work. That means “work” in the literal sense of direct employment. It also means being part of a society that renews its capacity to make steady and imperfect progress. Pragmatic political life requires accepting the partial nature of every solution and the grief that comes when some miss out. Such pragmatism can be risky for politicians, but our country’s best statesmen have managed it.

Paradoxes of Pigmentation

Zoe_Saldana

Nina Jablonski in Berfrois:

Far from the bright lights of Holly/Bolly, many people think that their own dark skin casts a shadow over their lives. They sense that people think less of them because of it, and that somehow their skin is literally a black mark against them when they seek a job or a marriage partner. Why does skin colour matter so much, and why – in light of myriad anti-colour discrimination laws now on the books around the world – does it appear to matter as much or more today than it did at the height of the civil rights and anti-apartheid movements a half century ago?

At the outset, recall that we are primates, and as such are obsessed with everything visual. We are observant, imitative and status-conscious too; and assess the appearance of others consciously and unconsciously as we decide what to do from one moment to the next. Our brains expend great cognitive effort in the interpretation of faces, and we instantaneously assess information about a person’s age, health, mood, intention and attractiveness as we scan their face. Our perceptions of attractiveness are also affected by social factors. We are inordinately influenced by our peers, especially as adolescents, because we seek acceptance and fear rejection. At the same time we also become highly conscious of social position, and seek to emulate individuals who we perceive as having higher status. Social anxiety about peer evaluation often persists through adulthood, with the tendency to imitate being more pronounced in women than in men. Looking or acting like someone with high status confers status by proxy.

Our urge to imitate people of higher social status or greater popularity has deep evolutionary roots. It has only been in the last few thousand years, however, that widely circulated and privileged images – on coins, stamps, photographs and in digital images – have given us opportunities to imitate people we have never seen. Images of “attractive” people and celebrities are electronically captured and rapidly propagated by the media, cell phone, social media and advertising. This highly dynamic and ever-growing reservoir of visual imagery affects how people translate perceptions of appearance into judgements.

Eugene D. Genovese, 1930 — 2012

Dog-GENOVESE1-obit-articleLargeLeo Ribuffo in Jacobin Magazine:

The death of a favorite teacher in his or her late old age typically evokes strong emotions from former students in their early old age. In this case the emotions are mine and the teacher is Gene Genovese, one of my professors at Rutgers when I was an undergraduate from 1962 to 1966. We remained in contact off-and-on over the decades and I saw him last in Atlanta in July 2010. This piece is not another attempt to offer an instant analysis of the “real” Genovese, an enterprise now well underway in cyberspace. Rather, I want to add something to the story from the perspective of an undergraduate he taught who subsequently entered what Gene called the “history business.”

I first heard about Gene in the fall of 1963, the first semester of my sophomore year, from my friend Ken O’Brien (who also entered the history business). Ken was taking Gene’s course in American Negro history. As a naive 18-year-old from a white working class-lower middle class New Jersey family, I was surprised to hear that this subject existed. I soon learned in detail that it did from Genovese himself. During the spring semester of 1964, the Intro US history course since the 1870s, taught in lecture by the terrifying Richard P. McCormick, allowed some students to take tutorials in small groups. Three of us were assigned to Gene. Our first assignment was to make sense of the currency issue in the late 19th century via debates in the Congressional Record. No, I’m not making this up. During the rest of the semester Gene tamped down my enthusiasm for William Jennings Bryan (a racist), delighted in my discovery that Theodore Roosevelt posed no threat to the standing order, and chided me for still liking Woodrow Wilson (the worst racist of the lot).

During my junior and senior years I took three courses from Gene, a two semester sequence on the history of the American South and a seminar on comparative slavery in which I first heard the word “hegemony.” I was attracted by Gene the professor rather than by the subject matter.

Reading ‘A Farewell to Arms’

From The Atlantic:

Farewell-to-arms-tmI commute every week up top for my teaching gig, mostly on the bus. It's about a four-hour ride, the upside of which is the large amount of reading I get done. I knocked out Invisible Man, which I would love to talk to you about, given our conversations around Richard Wright. Another time. Right now I'm reading A Farewell To Arms and sort of amazed at the virtuosity of the prose. It's not simply that Hemingway can write beautifully, but that he can write beautifully in many different ways. He opens up with this really lyrical, almost dreamscape-like description, and then throughout the book alternates that style a kind of hard-edged staccato. He doesn't much like to go on with long descriptions of characters, he just sort of puts them there and lets you get to know them.

I can't really speak to their power yet, as I have not finished the book. But there is a lot to be learned here about how to change gears, something I struggle with, frankly. I'll find a pretty riff and play that bad boy for 10K words without looking back. It can get boring. I think you need mountains, valleys, and fields. It can't always be the rolling hills. Perhaps it is juvenile of me but my favorite part is this:

He looked at the priest and shouted, “Every night priest five against one!”
I hate to think what happens when they teach this in high schools.
Listen to Hemingway's beautiful Nobel Prize acceptance speech here.

A poetic reading of the GOP platform

RomFrom Salon:

Right-wingers seem more than unbright,

Since when Ryan says Romney will fight

To end medicare,

Women’s rights, and clean air,

They hear, “Vote for us since we’re both white.”

Mike Moulton

Help for Mitt has been offered by — Newt!

To make debates wily and cute,

He tweets him to speak,

With brashness and cheek –

And Obama will have him en croute!

Shirley Stuart

More here.

Sunday Poem

Not Many Kingdoms Left

I write the lips of the moon upon her shoulders. In a temple
of silvery farawayness I guard her to rest.

For her bed I write a stillness over all the swans of the
world. With the morning breath of the snow leopard I cover
her against any hurt.

Using the pen of rivers and mountaintops I store her pillow
with singing.

Upon her hair I write the looking of the heavens at early
morning.

—Away from this kingdom, from this last undefiled place, I
write civilizations, governments, and all other spirit-forsaken
and soldiery institutions. O cold beautiful blossoms, the lips
of the moon moving upon her shoulders . . . Stand off! Stand
off!

by Kenneth Patchen
from Kenneth Patchen Selected Poems
New Directions Books, 1957

Hymns to Misunderstanding

Odradek-and-other-novels

Having captured this Mathews omnibus, I didn’t begin reading immediately. How much time passed before I entered, via The Conversions, the Mathewsian orbit? (Surely my journals from the period could help me pin down the date—if only I could find the journals.) It hardly matters. The book had been waiting in the store for me; it had been waiting in its tangible form for 22 years; it has sat on my shelf, in five different homes, to be consulted again with pleasure. “Mathews’ work is virtually indescribable in brief,” the back cover stated, then went on to do so: “His is a genius of wild invention presented in a kind of meticulous deadpan narration that leaves the reader howling, amazed, and exhilarated.” It is not hyperbole. The Conversions begins with an impenetrable ideogram, a circular maze sealed off completely, no way in or out. From the start, the prose exudes an eerie and compelling calmness. In quick order, the narrator relates a racing competition of Rousselian strangeness (an intricate affair combining woodwinds and worms) and then meets a novelist who provides a summary of his book The Sores, in which three early music enthusiasts try to survive a polar plane crash.

more from Ed Park at The Quarterly Conversation here.

do we know germany?

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Nooteboom found the sort of fears that Grass expresses everywhere. “One question was on everyone’s mind at the time, and by everyone, I mean Germans themselves most of all: ‘What kind of country are we becoming?’” he writes. “Students at my readings would ask, ‘Aren’t you frightened of us?’ No, I wasn’t, but I was concerned that they thought I should be, as though they did not trust their own country.” Why not? Germany’s history certainly plays a role. “Never again” shall there be a Hitler, a Nazi revival, a nightmare such as Auschwitz, is the constant refrain that colours German political debate. But there is something else. “Germany is unfinished,” he says. “It is ancient, but it is still being made, and that ambiguity makes it fascinating.”

more from Quentin Peel at the FT here.

A Hippie Dream

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On the one hand, “Waging Heavy Peace” is a mess — sprawling, improvisational, like a sloppy 40-minute jam on “Like a Hurricane.” But it is also revealing, even (at times) oddly beautiful, a stream-of-consciousness-meditation on where Young has been, where he thinks he’s going and, perhaps most revealing, where he is right now. “Not that it matters much,” he tells us, “but recently I stopped smoking and drinking…. The big question for me at this point is whether I will be able to write songs this way. I haven’t yet, and that is a big part of my life. Of course I am now sixty-five, so my writing may not be as easy-flowing as it once was, but on the other hand, I am writing this book. I’ll check in with you on that later. We’ll see how it goes.” The smoking to which Young refers is, of course, weed, which he has long regarded as a key to his creativity. As such, his not altogether willing sobriety becomes one of the threads of “Waging Heavy Peace,” a through line that roots the book in the here and now.

more from David L. Ulin at the LA Times here.